* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

em,
i {
  font-style: normal;
}

li {
  list-style-type: none;
}

img {
  border: 0;
  vertical-align: middle;
}

a {
  text-decoration: none;
}

input {
  border: 0;
  outline: none;
}

html,
body {
  background-color: #f2f5f6;
  font: 14px / 1.5 system-ui, -apple-system, "Segoe UI","PingFang SC", "微软雅黑", 
        "Microsoft YaHei", Helvetica, "Helvetica Neue", Tahoma, Arial, sans-serif;
  color: #1d1f21;
}